Yes it works! Well it tells me a cruiser will support me in the attack etc., trouble is i called it way to early i just wanted to know what this does, click on the icon then set waypoints for the ship to travel - i was a couple 100miles from the icon though shadowing a small taskforce - two light cruisers 4 escorts. So never got to know whether the ship showed up or not cause two of the leading destroyers caught me on the surface so i had to dive and evade.
But good to know the icons are there.
Anyways im still evading, two escorts above me somewhere!